public class ClientClass {
    public static void main(String args[]) {
        IBirthdayCake birthdayCake = new Cake();
        birthdayCake.show();
        Cream cream = new Cream(birthdayCake);
        cream.PutCream();

        Fruit fruit = new Fruit( cream );
        fruit.PutFruit();
        fruit.show();
    }
}